I claim, the ornamental design for a fuel tank platform, as shown and described.
FIG. 1 is a perspective front view of a fuel tank platform showing our new design, the broken lines are for illustrative purposes only and form no part of the claimed design;
FIG. 2 is another perspective view of the fuel tank platform of FIG. 1;
FIG. 3 is a top plan view of the fuel tank platform of FIG. 1;
FIG. 4 is a front elevation view of the fuel tank platform of FIG. 1;
FIG. 5 is a rear elevation view of the fuel tank platform of FIG. 1;
FIG. 6 is a bottom plan view of the fuel tank platform of FIG. 1;
FIG. 7 is a left side elevation view of the fuel tank platform of FIG. 1; and,
FIG. 8 is a right side elevation view of the fuel tank platform of FIG. 1.